Valved Exhaust System withPolished Tips Porsche 991 GT3, GT3RS 14-16


Agency Power

AGP AP-991GT3-170P

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Driving the Porsche GT3 is extremely fun with its high revving naturally aspirated power band. However like other Porsche cars, it just does not have that aggressive sports car sound. Especially one for a car that is supposed to be oriented for the track. This is why we have developed the new Agency Power Valved Exhaust System, which is a direct replacement for the factory muffler. This Agency Power Valve Exhaust muffler features precision mandrel bent tubes, T303 high quality stainless steel construction, beautiful TIG welds and integrated exhaust valves that allow you to change the sound characteristics of the exhaust with a push of a button. This exhaust fits all 14-16-2016 Porsche GT3, GT3RS and GT3RS 4. 0.

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

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